zcash-sync/src/main/rpc.rs

#[macro_use]
extern crate rocket;

use anyhow::anyhow;
use rocket::fairing::AdHoc;
use rocket::response::Responder;
use rocket::serde::{json::Json, Deserialize, Serialize};
use rocket::{Request, response, Response, State};
use rocket::http::Status;
use warp_api_ffi::api::payment::{Recipient, RecipientMemo};
use warp_api_ffi::{AccountRec, CoinConfig, TxRec};
use thiserror::Error;

#[derive(Debug, Error)]
pub enum Error {
    #[error(transparent)]
    Other(#[from] anyhow::Error),
}

impl<'r> Responder<'r, 'static> for Error {
    fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
        let error = self.to_string();
        Response::build_from(error.respond_to(req)?)
            .status(Status::InternalServerError)
            .ok()
    }
}

#[rocket::main]
async fn main() -> anyhow::Result<()> {
    let _ = dotenv::dotenv();
    warp_api_ffi::init_coin(
        0,
        &dotenv::var("ZEC_DB_PATH").unwrap_or("./zec.db".to_string()),
    )?;
    warp_api_ffi::set_coin_lwd_url(
        0,
        &dotenv::var("ZEC_LWD_URL").unwrap_or("https://mainnet.lightwalletd.com:9067".to_string()),
    );

    let _ = rocket::build()
        .mount(
            "/",
            routes![
                set_lwd,
                set_active,
                new_account,
                list_accounts,
                sync,
                rewind,
                get_latest_height,
                get_backup,
                get_balance,
                get_address,
                get_tx_history,
                pay,
            ],
        )
        .attach(AdHoc::config::<Config>())
        .launch()
        .await?;

    Ok(())
}

#[post("/set_lwd?<coin>&<lwd_url>")]
pub fn set_lwd(coin: u8, lwd_url: String) {
    warp_api_ffi::set_coin_lwd_url(coin, &lwd_url);
}

#[post("/set_active?<coin>&<id_account>")]
pub fn set_active(coin: u8, id_account: u32) {
    warp_api_ffi::set_active_account(coin, id_account);
}

#[post("/new_account", format = "application/json", data = "<seed>")]
pub fn new_account(seed: Json<AccountSeed>) -> Result<String, Error> {
    let id_account = warp_api_ffi::api::account::new_account(
        seed.coin,
        &seed.name,
        seed.key.clone(),
        seed.index,
    )?;
    warp_api_ffi::set_active_account(seed.coin, id_account);
    Ok(id_account.to_string())
}

#[get("/accounts")]
pub fn list_accounts() -> Result<Json<Vec<AccountRec>>, Error> {
    let c = CoinConfig::get_active();
    let db = c.db()?;
    let accounts = db.get_accounts()?;
    Ok(Json(accounts))
}

#[post("/sync?<offset>")]
pub async fn sync(offset: Option<u32>) -> Result<(), Error> {
    let c = CoinConfig::get_active();
    warp_api_ffi::api::sync::coin_sync(c.coin, true, offset.unwrap_or(0), |_| {}).await?;
    Ok(())
}

#[post("/rewind?<height>")]
pub async fn rewind(height: u32) -> Result<(), Error> {
    warp_api_ffi::api::sync::rewind_to_height(height).await?;
    Ok(())
}

#[get("/latest_height")]
pub async fn get_latest_height() -> Result<Json<Heights>, Error> {
    let latest = warp_api_ffi::api::sync::get_latest_height().await?;
    let synced = warp_api_ffi::api::sync::get_synced_height()?;
    Ok(Json(Heights { latest, synced }))
}

#[get("/address")]
pub fn get_address() -> Result<String, Error> {
    let c = CoinConfig::get_active();
    let db = c.db()?;
    let address = db.get_address(c.id_account)?;
    Ok(address)
}

#[get("/backup")]
pub fn get_backup(config: &State<Config>) -> Result<Json<Backup>, Error> {
    if !config.allow_backup {
        Err(anyhow!("Backup API not enabled").into())
    } else {
        let c = CoinConfig::get_active();
        let db = c.db()?;
        let (seed, sk, fvk) = db.get_backup(c.id_account)?;
        Ok(Json(Backup { seed, sk, fvk }))
    }
}

#[get("/tx_history")]
pub fn get_tx_history() -> Result<Json<Vec<TxRec>>, Error> {
    let c = CoinConfig::get_active();
    let db = c.db()?;
    let txs = db.get_txs(c.id_account)?;
    Ok(Json(txs))
}

#[get("/balance")]
pub fn get_balance() -> Result<String, Error> {
    let c = CoinConfig::get_active();
    let db = c.db()?;
    let balance = db.get_balance(c.id_account)?;
    Ok(balance.to_string())
}

#[post("/pay", data = "<payment>")]
pub async fn pay(payment: Json<Payment>, config: &State<Config>) -> Result<String, Error> {
    if !config.allow_send {
        Err(anyhow!("Payment API not enabled").into())
    } else {
        let c = CoinConfig::get_active();
        let latest = warp_api_ffi::api::sync::get_latest_height().await?;
        let from = {
            let db = c.db()?;
            db.get_address(c.id_account)?
        };
        let recipients: Vec<_> = payment
            .recipients
            .iter()
            .map(|p| RecipientMemo::from_recipient(&from, p))
            .collect();
        let txid = warp_api_ffi::api::payment::build_sign_send_multi_payment(
            latest,
            &recipients,
            false,
            payment.confirmations,
            Box::new(|_| {}),
        )
        .await?;
        Ok(txid)
    }
}

#[derive(Deserialize)]
#[serde(crate = "rocket::serde")]
pub struct Config {
    allow_backup: bool,
    allow_send: bool,
}

#[derive(Deserialize)]
#[serde(crate = "rocket::serde")]
pub struct AccountSeed {
    coin: u8,
    name: String,
    key: Option<String>,
    index: Option<u32>,
}

#[derive(Serialize)]
#[serde(crate = "rocket::serde")]
pub struct Heights {
    latest: u32,
    synced: u32,
}

#[derive(Serialize)]
#[serde(crate = "rocket::serde")]
pub struct Backup {
    seed: Option<String>,
    sk: Option<String>,
    fvk: String,
}

#[derive(Deserialize)]
#[serde(crate = "rocket::serde")]
pub struct Payment {
    recipients: Vec<Recipient>,
    confirmations: u32,
}